ITS1A clock boards
ITS1A Clock
This is a clock for the vintage ITS1A thyratron tubes. I didn’t think that my first six tube clock would be an ITS1A clock, but after I got some of the tubes and spent a little time getting them to light up (and then be able to control what was displayed), it seemed a small step to building an actual clock.
Guiding Principles
- I wanted this to be all through-hole components so that I could sell spare boards as kits for others to build.
- I wanted to re-use a lot of my existing clock code that runs on ESP8266 chips.

You can read more about the project on my blog
Here is a video of it in action:
ITS1A clock boards
Project images are for reference only. Actual production is based on the manufacturing files on the project page.
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Igor Orlianskyi
Feb 24,2025
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CoconutTime
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